Tuning the Magnetic Exchange via a Control of Orbital Hybridization in ${\mathrm{Cr}}_{2}({\mathrm{Te}}_{1\ensuremath{-}x}{\mathrm{W}}_{x}){\mathrm{O}}_{6}$

Tuning the Magnetic Exchange via a Control of Orbital Hybridization in ${Cr}_{2} ({Te}_{1 - x} W_{x}) O_{6}$

M. Zhu, D. Do, C. R. Dela Cruz, Z. Dun, H. D. Zhou, S. D. Mahanti, and X. Ke

Phys. Rev. Lett. 113, 076406 – Published 12 August 2014

Abstract

We report the complex magnetic phase diagram and electronic structure of ${Cr}_{2} ({Te}_{1 - x} W_{x}) O_{6}$ systems. While compounds with different $x$ values possess the same crystal structure, they display different magnetic structures below and above $x_{c} = 0.7$ , where both the transition temperature $T_{N}$ and sublattice magnetization ( $M_{s}$ ) reach a minimum. Unlike many known cases where magnetic interactions are controlled either by injection of charge carriers or by structural distortion induced via chemical doping, in the present case it is achieved by tuning the orbital hybridization between $Cr 3 d$ and $O 2 p$ orbitals through $W 5 d$ states. The result is supported by ab initio electronic structure calculations. Through this concept, we introduce a new approach to tune magnetic and electronic properties via chemical doping.

Received 3 January 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.076406

Authors & Affiliations

M. Zhu¹, D. Do¹, C. R. Dela Cruz², Z. Dun³, H. D. Zhou^3,4, S. D. Mahanti¹, and X. Ke^1,*

¹Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
²Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
³Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
⁴National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA